diff options
Diffstat (limited to 'include/linux/err.h')
| -rw-r--r-- | include/linux/err.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/err.h b/include/linux/err.h index b5d9bb2a2349..8c37be0620ab 100644 --- a/include/linux/err.h +++ b/include/linux/err.h @@ -42,6 +42,20 @@ static inline void * __must_check ERR_PTR(long error) } /** + * INIT_ERR_PTR - Init a const error pointer. + * @error: A negative error code. + * + * Like ERR_PTR(), but usable to initialize static variables. + */ +#define INIT_ERR_PTR(error) ((void *)(error)) + +/* Return the pointer in the percpu address space. */ +#define ERR_PTR_PCPU(error) ((void __percpu *)(unsigned long)ERR_PTR(error)) + +/* Cast an error pointer to __iomem. */ +#define IOMEM_ERR_PTR(error) (__force void __iomem *)ERR_PTR(error) + +/** * PTR_ERR - Extract the error code from an error pointer. * @ptr: An error pointer. * Return: The error code within @ptr. @@ -51,6 +65,9 @@ static inline long __must_check PTR_ERR(__force const void *ptr) return (long) ptr; } +/* Read an error pointer from the percpu address space. */ +#define PTR_ERR_PCPU(ptr) (PTR_ERR((const void *)(__force const unsigned long)(ptr))) + /** * IS_ERR - Detect an error pointer. * @ptr: The pointer to check. @@ -61,6 +78,9 @@ static inline bool __must_check IS_ERR(__force const void *ptr) return IS_ERR_VALUE((unsigned long)ptr); } +/* Read an error pointer from the percpu address space. */ +#define IS_ERR_PCPU(ptr) (IS_ERR((const void *)(__force const unsigned long)(ptr))) + /** * IS_ERR_OR_NULL - Detect an error pointer or a null pointer. * @ptr: The pointer to check. |